{"p":"can-20","op":"mint","tick":"can","amt":"1000","rows":[{"df":"qa","content":[{"q":"How does blockchain ensure the integrity and security of data?","a":"Distributed storage: The data and ledgers in the blockchain network are distributed  across nodes, without a centralized storage server. This makes the data difficult to attack or destroy. Any downtime or attacks on nodes will not lead to data loss or tampering."}]}],"pr":"f51c81a1b46f569661b90dd03b69c85e98796386ba7cb7a2e55ff8a47d2d5935"}